As part of your prenatal care, you will have blood tests to find out your blood type. If your blood lacks the Rh antigen, it is called Rh-negative. If it has the antigen, it is called Rh-positive. During this 26th week, Dr. Jill Mauldin explains in detail what the Rh factors mean to you and your baby, what to look for and when medication is necessary.

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